juice citrus, add sugar, mix well and serve on the rocks. rim the glass with salt or grind a bit of salt over the ice before you fill the glass. you could do a blended margarita, if you prefer.
makes 1.5 qt of ready-to-serve margaritas, which seems like it would serve about 3-4 people, but these are REALLY tasty, so plan to make a double batch or more if you are making them for more than 2 people.